103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
/*
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* This file is part of gerbolyze, a vector image preprocessing toolchain
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* Copyright (C) 2021 Jan Sebastian Götte <gerbolyze@jaseg.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <cmath>
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#include <algorithm>
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#include <string>
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#include <iostream>
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#include <iomanip>
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#include <clipper.hpp>
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#include <gerbolyze.hpp>
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#include <svg_import_defs.h>
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#include <svg_geom.h>
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using namespace gerbolyze;
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using namespace std;
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namespace gerbolyze {
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class Flattener_D {
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public:
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ClipperLib::Clipper c;
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};
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}
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Flattener::Flattener(PolygonSink &sink) : m_sink(sink) {
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d = new Flattener_D();
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d->c.StrictlySimple(true);
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}
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Flattener::~Flattener() {
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delete d;
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}
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void Flattener::header(d2p origin, d2p size) {
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m_sink.header(origin, size);
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}
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Flattener &Flattener::operator<<(GerberPolarityToken pol) {
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if (m_current_polarity != pol) {
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m_current_polarity = pol;
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}
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return *this;
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}
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Flattener &Flattener::operator<<(const Polygon &poly) {
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ClipperLib::Path le_path;
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for (auto &p : poly) {
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le_path.push_back({(ClipperLib::cInt)round(p[0] * clipper_scale), (ClipperLib::cInt)round(p[1] * clipper_scale)});
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}
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ClipperLib::Paths out;
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if (m_current_polarity == GRB_POL_DARK) {
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d->c.AddPath(le_path, ClipperLib::ptSubject, true);
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d->c.Execute(ClipperLib::ctUnion, out, ClipperLib::pftNonZero);
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} else { /* clear */
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d->c.AddPath(le_path, ClipperLib::ptClip, true);
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d->c.Execute(ClipperLib::ctDifference, out, ClipperLib::pftNonZero);
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}
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d->c.Clear();
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d->c.AddPaths(out, ClipperLib::ptSubject, true);
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return *this;
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}
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void Flattener::footer() {
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ClipperLib::PolyTree t_out;
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d->c.Execute(ClipperLib::ctDifference, t_out, ClipperLib::pftNonZero);
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d->c.Clear();
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m_sink << GRB_POL_DARK;
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ClipperLib::Paths out;
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cerr << "deholing" << endl;
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dehole_polytree(t_out, out);
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for (auto &poly : out) {
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Polygon poly_out;
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for (auto &p : poly) {
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poly_out.push_back({p.X / clipper_scale, p.Y / clipper_scale});
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}
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m_sink << poly_out;
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}
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m_sink.footer();
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}
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